The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 2001
Filed:
May. 17, 1999
Jeffrey D. Hoffman, Chandler, AZ (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
A cipher system having a cipher core to encrypt plaintext data into ciphertext data, and a bus interface coupled to the cipher core to transfer the ciphertext data to a bus. In one embodiment, the cipher core comprises a block assembler to receive words of data and to assemble the words into a block, an encryption function to encrypt the block based on an encryption function key, a block transmitter to receive the encrypted block and to disassemble the encrypted block into encrypted data words, and a controller to control multiple rounds of encryption by the encryption function for the block. In another embodiment, the encryption function is duplicated and the controller is replaced by two controllers, the first controller controlling the first five rounds of encryption of the block and the second controller controlling the second five rounds of encryption of the block.